Gulf of St. Lawrence and Scotian Shelf Ice Extent Data 1815-2024 - Historical sea ice and iceberg conditions in the North Atlantic

Flowing seawards through Cabot Strait (km2)

YEAR	Dec (of prev. year)	January	February	March	April	May	June	Winter Ave.
1815			11,753			3,812		7,783
1816								0
1817			11,937		3,326	13,988		9,750
1818				10,235		4,423		7,329
1819					3,254			3,254
1820								0
1821								0
1822								0
1823								0
1824								0
1825					9,859			9,859
1826								0
1827								0
1828		49,782			18,186			33,984
1829					41,961			41,961
1830								0
1831								0
1832	3,391	11,088	88,846		4,229	3,403	1,000	18,660
1833		20,097	30,218			36,800		29,038
1834						10,132		10,132
1835					30,000	18,467		24,234
1836								0
1837				28,275				28,275
1838						36,473		36,473
1839			21,450		21,473			21,462
1840								0
1841					5,026			5,026
1842					206			206
1843					55,304			55,304
1844		4,835	6,612			36,002	25,316	18,191
1845				8,193	5,714	17,825		10,577
1846				199,150	44,919	8,621		84,230
1847		2,010		148,430	110,380			86,940
1848				16,954	23,420	16,529		18,968
1849		18,007	34,924	136,670	9,937	7,974		41,502
1850					38,029	8,666		23,348
1851		4,704	27,897					16,300
1852		2,359		77,157	45,430			41,649
1853								0
1854		68,977	105,670	13,542	3,359	31,163		44,542
1855			79,561	59,682	48,713	11,897		49,963
1856			28,051	164,840	105,260			99,384
1857								0
1858				72,547		76,520		74,534
1859			12,594	131,810				72,202
1860				1,045				1,045
1861		175						175
1862			3,921	13,965	32,560	20,365		17,703
1863			58,712	153,480	99,122	1,856		78,293
1864		9,241		13,495	155,920	25,910		51,142
1865								0
1866			38,477	28,755				33,616
1867				107,120	70,469			88,795
1868		36,213		102,740	68,587	38,738		61,570
1869			33,793	102,830				68,312
1870					1,680			1,680
1871								0
1872		18,986	37,359	47,309	30,162	21,721	10,015	27,592
1873			28,941	112,600	83,138			74,893
1874			5,266	8,396	15,587			9,750
1875		71,134	184,040	128,500	112,680	18,186		102,908
1876		23,713	136,690	152,920	89,045	13,797		83,233
1877		17,734	53,746	25,747		2,419		24,912
1878		2,189		16,981	13,752			10,974
1879			16,483	35,738	21,973	6,057		20,063
1880			17,456	21,288	32,297	22,687		23,432
1881			32,303	24,476	32,621	18,705		27,026
1882		36,422	38,769	46,447	67,115	54,758		48,702
1883		26,920	79,036	118,850	19,477	7,390		50,335
1884		41,285	27,191	47,306	11,178	1,994		25,791
1885		27,373	127,470	99,408	36,741	15,894		61,377
1886				43,759	7,443	3,029		18,077
1887		2,401	56,749	98,026	73,595	68,127		59,780
1888		18,542	57,481	78,273	34,123	6,758		39,035
1889		7,571	41,555	10,776	3,781			15,921
1890		25,041	86,671	31,433	36,825	10,365		38,067
1891		6,630	50,720	53,649	40,232	2,798		30,806
1892				3,037	26,958	847		10,280
1893				74,590	33,866			54,228
1894			40,063	68,729	61,192			56,661
1895			5,125	60,510	35,213			33,616
1896			17,666	24,615	2,267			14,849
1897		12,244	43,146	75,451	13,459	20,891		33,038
1898		3,431	47,585	18,183	53,598			30,699
1899		7,880	42,472	59,441	12,210			30,501
1900			8,281	11,059	3,257			7,532
1901			1,948	23,762	549			8,753
1902				8,292				8,292
1903		13,298	39,208	75,928	16,812			36,312
1904		18,003	66,343	69,374	57,621	34,578		49,184
1905		26,824	68,723	110,810	55,413	42,631		60,880
1906				23,478	8,755			16,116
1907		1,438	22,034	110,880	45,385	31,666	508	35,319
1908			6,247	17,026	55,123	22,318		25,179
1909			16,870	17,003	29,356	8,548	147	14,385
1910				344				344
1911			40,640	35,705	30,164			35,503
1912			88,559	92,783	50,833	64,278		74,113
1913			30,092	42,406	21,226			31,241
1914			86,587	54,927	70,742	17,460		57,429
1915		801	32,535	23,309	40,251	3,965		20,172
1916			8,474	57,707	2,894	2,563		17,909
1917		9,818	25,947	21,835	72,401			32,500
1918		7,440	81,123	135,410	118,930	103,510		89,283
1919				11,813	25,040			18,427
1920		3,500	83,952		15,955			34,469
1921	3,874	17,458	44,711	16,389	59,792			28,445
1922		73,839	125,150	133,420	61,812	49,756		88,795
1923		1,524	259,860	203,040	76,075	77,424		123,585
1924			70,034	86,318	42,994	11,267		52,653
1925		41,974	51,209	22,863	12,961			32,252
1926			63,693	49,766	81,621	43,551		59,658
1927			72,183	31,697	49,801	11,096		41,194
1928			54,195	55,842	21,531			43,856
1929		34,812	25,376	47,418	21,580	12,443		28,326
1930		2,665	27,591	398	4,226			8,720
1931			3,047	1,565	1,012			1,875
1932			42,715	88,993	30,089			53,932
1933		1,079	29,308	16,729	7,022			13,535
1934	208	45,241	29,745	54,276	37,223			33,339
1935			44,746	117,940	106,050	36,590		76,332
1936			4,991	1,234				3,112
1937			15,416	22,925	33,732	1,307		18,345
1938			18,157	43,798	25,142			29,032
1939			27,703	61,236	49,424	2,970		35,333
1940				59,462	38,677	1,645		33,261
1941			25,324	53,820	64,565			47,903
1942			20,605	31,973	48,706	3,779		26,266
1943		32,173	51,702	56,486	57,342			49,426
1944			61,669	100,500	63,893			75,354
1945			278	21,574	3,485			8,446
1946			15,238	66,945	44,871			42,351
1947		5,348	23,934	19,786	21,052	124		14,049
1948			22,346	97,094	39,996	16,500		43,984
1949				17,291	48,429			32,860
1950			9,417	75,256	59,533	11,835		39,010
1951		0	0	0	0	0		0
1952			203	21,692	37,548			19,814
1953			23,621	11,541				17,581
1954			1,353	16,827	21,113			13,098
1955				7,972	11,153			9,563
1956				16,487	14,164			15,326
1957		12,159	46,374	78,258	75,830	30,030		48,530
1958		0	0	0	0	0		0
1959			77,256		23,768			50,512
1960				536	670			603
1961		5,147	39,544	32,827	11,897	3,573		18,597
1962			37,650	18,800	19,192	18,800		23,611
1963			12665	30262	12869	1009		14,201
1964		1028	18074	19062	14017	3899		11,216
1965		584	12068	17282	12802	4332		9,414
1966			4429	4532	1655			3,539
1967			6150	18537	5769	3278		8,434
1968		2498	19348	28290	13167			15,826
1969		0	0	0	0	0		0
1970			3449	6287	6174			5,303
1971		381	8621	8646	2079			4,932
1972		8265	26747	29349	2490	2834		13,937
1973		10564	20715	42517	15139	2677		18,322
1974		3076	33442	45459	26208	106		21,658
1975			40717	36393	31411	2920		27,860
1976		1019	10246	28897	3436			10,899
1977		12394	31272	22398	9569	2561		15,639
1978		517	8150	28086	20532	3134		12,084
1979			39321	24334	12781			25,479
1980		2587	17281	20979	4629			11,369
1981		12706	15659	3677				10,681
1982		1497	15640	45078	20555			20,693
1983			408	2767	1325			1,500
1984		931	8489	7968	661			4,512
1985		17795	48712	57863	25770			37,535
1986		8222	42608	46642	16026			28,374
1987		207	25042	25623	4899	381		11,230
1988		2452	8809	23200	13067			11,882
1989		4672	28274	47367	11495	169		18,395
1990		13226	44150	71939	11778			35,273
1991		5318	25288	16994	12785	1262		12,329
1992		4701	15936	46175	30392	4810		20,403
1993		6647	35691	31306	12120	1271		17,407
1994		8473	47468	37470	19031			28,110
1995		11651	19566	8779	2335			10,583
1996		1001	5498	9822	2844			4,791
1997		100	7487	25188	14644	977		9,679
1998		2910	3492	942	182			1,881
1999		35	4881	3165	1851			2,483
2000			8303	5715				7,009
2001			4860	11443	1803			6,035
2002			4010	6690	3093			4,598
2003		1780	31563	55719	23655			28,179
2004		2060	24727	13429	6400			11,654
2005		7912	8189	11998	3911			8,002
2006				4324				4,324
2007			16087	21871	2202			13,386
2008		546	10343	15071	12810			9,693
2009		4569	19589	28846	6122			14,781
2010			133					133
2011			1149	954				1,052
2012			1968	4567				3,267
2013			2903	2459	2208			2,523
2014			16788	30033	9081			18,634
2015			11884	37863	26833			25,527
2016				1570				1,570
2017			560	10242	1115			3,972
2018		3176	15061	2601	3229			6,017
2019		759	23939	44881	10237			19,954
2020			8968	9549	306			6,274
2021				4232				4,232
2022			1792	10316	1797			7,476
2023			1978	930				1,454
2024	0	0	0	0	0	0

For modern times, post 1963, averages are based on the number weeks when ice was actually present.